<!DOCTYPE html> 
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>
    html基础语法
</title>
<style>
    img{
        width: 200px;
    }
    .my-video{
        width:400px;
    }
</style>
</head>
<body>
    <div>helloworld</div>
    <p>pppppppppppppp</p>
    <a href="http://www.baidu.com">去百度</a>
    <ul>
        <li>html</li>
        <li>css</li>
        <li>js</li>
    </ul>
    <ol>
        <li>html</li>
        <li>css</li>
        <li>js</li>
    </ol>
    <h1>
        hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
    </h1>
    <h2>
        hhhhhhhhhhhhhhhhh
    </h2>
    <h3>
        hhhhhhhhhhhhhhhhhh
    </h3>
    <h4>
        h4
    </h4>
    <h5>
        h5
    </h5>
    <h6>
        h6
    </h6>
    <audio src="http://music.163.com/song/media/outer/url?id=447925558.mp3"></audio>
    <video class="A" controls src=""></video>
</body>
</html>
